I download wader-core by windows, but i cant install it because modem-manager is installed. I've tryed sudo apt-get remove modem-manager but says there is no modem-manager installed..
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MattJun 7 '12 at 7:54

I know this question is a bit old but I have had the same problem and hopefully can help out someone else.

My modem is a Huawei E160 on Optus.

I first started Network Manager > Edit Connections, and created a new Mobile Broadband profile, filling in info as required.

After creating the profile, Edit and click on PPP Settings and make sure ONLY PAP is listed under Authentication.

At this point, my modem was recognized intermittently (like 1/1000 times) by Network Manager. However, when I typed:

lsusb

...into the terminal, the device was always there.

After a LOT of searching threads I found this solution (I can't find the thread again, and will add the link if I do). It seems the problem is that the modem is being seen as a mobile storage device (although it doesn't appear as a disk on the Home Folder) and not as a modem.

Type into the terminal:

sudo gedit /etc/modules

Add the following line:

usbserial vendor=0x12d1 product=0x1003

NOTE: for you the numbers may be different, you can find them by typing lsusb and noting the two numbers after ID that are separated by a :. The first one is the vendor ID and the second is the product ID.

Now save and exit and reboot WITH THE MODEM PLUGGED IN.

It should now appear. There may be other methods for getting it to work hot-plugged but I'm not aware as yet.